aTransportation use of natural gas is gas consumed in the operation of pipelines, primarily in compressors, and,since 1990, natural gas consumed as vehicle fuel.

gIncurred in the generation, transmission, and distribution of electricity plus plant use and unaccounted forelectrical system energy losses. Pre-1990 estimates are not comparable to those for later years. See Section 6 ofTechnical Notes for an explanation of changes in methodology.

bThrough 2004, includes kerosene-type and naphtha-type jet fuel. Beginning in 2005, includes kerosene-typejet fuel only; naphtha-type jet fuel is included in "Industrial sector, Other Petroleum."

– – = Not applicable.

cLiquefied petroleum gases, includes ethane and olefins.

Where shown, R = Revised data and (s) = Physical unit value less than 0.5 or Btu value less than 0.05.

dBeginning in 1993, motor gasoline includes fuel ethanol blended into the product.

Notes: Totals may not equal sum of components due to independent rounding. · The continuity of these dataseries estimates may be affected by the changing data sources and estimation methodologies. See the TechnicalNotes for each type of energy.

eThere is a discontinuity in this time series between 1980 and 1981 due to the expanded coverage ofrenewable energy sources beginning in 1981.